Waiting to takeoff can be one of the worst parts about flying.

But a YouTube video that's now gone viral shows some passengers who got to see a brighter side of air travel.

Passengers on an AirTran flight were all seated, waiting on a maintenance check.

Little did they know, the Indiana Wesleyan University Chorale was on board for an impromptu performance.

Watch the entire video, which was posted to YouTube in March 2011, below.